... flowbench? ... Unless intake and exhaust tuning start get into the act, I don't see how I can get better than 100% volumetric efficiency. intake airflow =...
I was talking to Lonn Peterson of Thunder Products, the producer of Dial-a-jet. He promotes the idea of making the inlet to the airbox adjustable as a tuning...
Making the inlet on the airbox adjustable is in principle the same as tuning the inlet stack length, the main arguement being if you restrict the port or inlet...
Working on a twisted crankshaft project for the old Yamaha 650 twin and the question of what camchain setup is best suited to a firing order of 0/83 degrees ...
Charles Finney*
finneys@...
Jul 1, 2004 7:46 pm
7275
... What's this "bf05t" chain - HyVo or roller chain ? I know the hot ticket for race Hyabusa cam drives is to convert them from HyVo to 219 roller chain - I'd...
Ian
iwd@...
Jul 2, 2004 3:25 pm
7276
... The bf05t chain is roller chain used in the early XS1 thru TX650s. The dirt track folks here insist on running this setup as they claim cam chain breakage...
Charles Finney*
finneys@...
Jul 2, 2004 3:43 pm
7277
... UUmmm. Here we go again...... The reasoning is just plain WRONG. The article starts off OK but then takes a U turn in logic. The best way to get more air...
Ian
iwd@...
Jul 2, 2004 3:59 pm
7278
... Me too. ... The 219 chain is pretty good stuff - is the bf05 obviously heavier or another pitch ? ( Maybe 5/16" ? ) Cheers IAN -- DRYSDALE MOTORCYCLE...
Ian
iwd@...
Jul 2, 2004 4:03 pm
7279
... Kind of amusing, if I could answer your question I probably wouldn't have needed to ask my question. No question the bf05 is metric, roller diameters are ...
Charles Finney*
finneys@...
Jul 2, 2004 4:11 pm
7280
If what you say is correct then how come a GSXR makes more horsepower with the airbox installed than with it removed. Removing the airbox means there is no ...
Fine. But what Ian is saying is it is not because the airbox adds extra pressure differential between the atmosphere and cylinder which makes the air/fuel...
Eric Kastanis
kastanis@...
Jul 2, 2004 6:32 pm
7282
there is a lot of interesting stuff on this site... http://www.snowtechmagazine.com/articles/turbocrank.html...
I know Ian will have a better answer than me to this one but, if the volume of the airbox is a near multiple of the swept volume of the engine then it will act...
Your last sentence is the correct one. They tried re-mapping the FI but were unable to gain the HP back. It looks like the Suzuki engineers did a very good...
Hi, Please, look up Helmholtz Resonator (I may have spelled it wrong). Basicaly, if you tune the frequency of the airbox to the frequency of the engine you get...
... I can buy into that but, I've always had this idea (accompanied by exactly "zero" working knowledge) that there may be ONE MORE parameter to consider when...
Ray & Sonja Crenshaw
raymanz93@...
Jul 3, 2004 12:50 pm
7288
... If the 219H chain was good enough for a Honda 160, it is no surprise it is good enough for a race Hyabusa. cheers, Michael...
... Here's a link to a picture of a combustion chamber from a Nash/Rambler V-8. http://www.wagoneers.com/FSJ/tech/Engines/327-V8/v8-fig09.jpg In a 1956...
... The go-kart chain is the same pitch ( Defintiely ) and roller size ( I think ) but is much heavier. This would seem to be an advantage but I am told of...
Ian
iwd@...
Jul 4, 2004 1:59 pm
7291
... You need maximum air pressure at the carbs for max power. I'm not sure what model GSXR you are talking about but I assume it is one of the pressurized...
Ian
iwd@...
Jul 4, 2004 2:09 pm
7292
... I haven't seen the inside of a recent model GP125 or 250 motor so who knows - this drilling trick might be the latest thing. The crank webs are right...
Ian
iwd@...
Jul 4, 2004 2:18 pm
7293
since this started with article on http://www.snowtechmagazine.com/articles/motherairbox.html I must say that now I bothered to read it twice and find it ok ...
Now perhaps a bit of discussion re Copper vs Aluminum crush washers? Aeroquip seems to use only the Al type. As do most of the carburetor/fuel system folks....
My experience is with older bikes with slide carbs. I've always been a little horrified or maybe confused that so many street bikes and nearly all dirt bikes...
Ummm...hey, wait a minnit; wasn't it the roller cam-chain that failed on the cool-off lap when Dick Mann won the Daytona 200 on the Honda 750 four? Or maybe...
It isn't specifically the cam chain itself that is the problem on the CB-750 single cam engine, it is the unsupported and undamped chain run. I have made cam...
This "crank" fan thing has been around a while. I have never seen it in anything real (GP motor or works MXer) I have a hard time with the principle, if it...
Back to the Yamaha 650 twin, there have been several cam chain guide systems. First has a slipper on the tension side and a roller on the slack side. All ...
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